Wrench.



G. A. HUNSINGER.

WRENCH.

APPLICATION FILED IEB.2, 1914 Patented Oct. 6, 1914.

VII/4 Z Z F/ Q EW a J 2 INVENTOR aad/ tty's THE NORRIS PETERS ca,PHOTO-LITHO.. WASHING foN. D. c.

GEORGE A. HUNSINGER, OF PITTSBURGH, PENNSYLVANIA WRENCH.

Specification of Letters Patent.

Patented Oct. n, 1914:.

Application filed February 2, 1914. Serial No. 815,854.

To 66 whom it may concern Be it known that I, Gnoncn A. HUN- SINGER,residing at Pittsburgh, in thecounty of Allegheny and State ofPennsylvania, a citizen of the United States, have invented ordiscovered certain new and useful 1mprovements in Wrenches, of whichimprovements the following is a specification.

My invention relates to pipe wrenches, and the object thereof is toprovide a wrench, the lever arm of which is jointed and may be adjustedfrom a straight line shape to Vari ous angular forms adapted to renderthe wrench useful to tighten joints inaccessible to the ordinarystraight and rigid handle wrench.

1n the accompanying sheet of drawings, forming part or my specificationand illustrating one embodiment of my invention, Figure 1 is a side viewof the wrench, the lever arm being straight; Fig. 2 is a bottom planview of Fig. 1; Figs. 3 and 1 are side views of the wrench illustratingtwo irregular positions of the lever arm; Figs. 5 and 6 are sectionalviews'taken, respectively, on the lines V-V andVI-VT, Fig. l; and Fig. 7is a perspective view ofthe handle-locking member.

In the several figures like numerals are used to designate like parts.

Referring to the illustrative embodiment of my invention, an arm,consisting preferably of two spaced bars 1 and 1, is provided at one endwith wrench jaws 2, 2, and at its opposite end a handle 3 is pivoted,the handle and arm forming the lever arm of the wrench. The jaws 2, 2may be of any de sired form, those shown herein constituting theessential parts of an ordinary pipe wrench, the jaw 2 being adjustable,by means of a thumb screw t, with relation to the aw 2 The wrench jawsare pivoted to the arm 1, 1 by means or a pin 5 rigidly secured to theaw 2 and extending through the bars, there being a portion of the pinprotruding beyond the outer face 01 the bar 1. The handle 3 ispreferably formed of two parts consisting of a bell crank lever 3 andthe gripping portion 3. A pin 6, rigidly secured to the lever portion 3,is rotatably mounted in the bars 1, 1 and is provided with an angularhead 7 The aws 2, 2 and the handle 3, 3- being thus pivotally mounted atopposite ends of the arm 1, 1, means are provided to connect thesemembers to each other so that their pivotal movements may besimultaneously effected, and also that the force applied to the handlemay be transmitted to the gripping jaws re ardless of the angularposition of the handle with relation to the arm 1, 1. The connectingmeans preferably consists of a link .8 pivoted to the outer end of onearm of the lever 23*,

and alsopivoted to a crank arm 9 rigidly wrench jaws will also be lockedin corresponding fixed positions; or the handle and jaws may have freepivotal movements. The

handle 3, 3 may be locked in alinement with the arm 1, l, or at an anglethereto, by means of a bar 10 having an angular hole at one end and around hole at the other, In Fig. 1 this bar is illustrated assimultaneously engaging the angular end 7 of the pin 6 and theprotruding end of the pin 5, thus locking the handle 3 against movementwith relation to the arm 1, l and hence (through bell-crank lever 3,link 8, crank arm 9 and pin 5) locking the jaws 2, 2 with relation tosaid arm. When, as shown herein, a hexagonal head 7 is used, the'handle3 may be locked at angles or" 15 on either side of the arm 1, l and,byusing a head with a greater number of faces, more angular adjustments ofthe handle may be efiected. Furthermore, when the handle 3 is detached,the bar 10 as illustrated in Fig. 1, may be used in place of the handle,and thus give a greater range of adjustment of handle with relation tothe arm 1, l

A second means is provided for locking the handle 3 in alinement withthe bar 1, 1. The handle is provided with a central stem 11 adapted tohave screw-threaded engagement with the outer end of the lever 3 as seenin Fig. 6, and a lockingmember engages said stem and the arm bars 1, 1.The locking member is particularly illustrated in Fig. 7 and comprises acap 12 adapted to fit upon the outer end of the lever 3, and tines 13adapted to extend into open ended slots formed in the ends of the armbars 1 and 1. The cap 12 has a central threaded hole 1d of the samediameter and pitch as the threaded opening at the end of the lever 3When the handle 8 is attached to the lever 3, as indicated in. Fig. 6,the locking member 12, 1S engaging the end. of said lever and arms 1, l,the wrench may be used as an ordinary straight-handle pipe wrench. Incase it is necessary to tighten a joint inaccessible to a straighthandled wrench the handle 3 may be unscrewed, the locking member turnedthrough an angle of 455 so that the tines will lie between the bars 1and 1, and the handle again screwed to the lever. in making this change,it will be observed that, as the threaded end of the stem ll isunscrewed from the end of the lever 3 the threaded hole 1 receives thethreaded stem 11. Thus the locking member remains attached. the handle,thereby facilitating the adjustment.

ll claim as my invention:

1. in a pipe wrench, the combination of an arm, a pair of gripping jawspivotally mounted at one end thereof, means for adjusting said jaws tofixed relative positions, a handle pivotall y mounted at the oppositeend of the arm, and connecting means be tween. said jaws and handle foreii ecting simultaneous pivotal movements thereof.

2. In a pipe wrench, the combination or an arm, a pair of gripping jawspivotally mounted at one end thereof, means for adjusting said aws tofixed relative positions, a handle pivotally mounted at the opposite endof the arm, and a rigid link pivotally connected at its opposite ends tosaid gripping jaws and handle, the connections of said link to the jawsand handle being eccentric with respect to their pivotal connections tosaid arm.

8. In a pipe wrench, the combination of an arm, a pair of gripping jawsprovided with a pin pivotally mounted in one end of said arm, and havinga crank arm rigidly secured thereto, means for adjusting said jaws tofixed relative positions, a handle pivotally mounted at the other end ofsaid arm and provided. also with a crank arm, and a link pivoted at itsopposite ends to the outer ends of each of said crankarnis.

4-. In a pipe wrench, the combination of an arm, a pair of gripping jawspivotally mounted at one end thereof, means for adjusting said jaws tofixed relative positions, a handle pivotally mounted at the other end ofsaid arm, and a single means for locking said jaws and handle at aplurality of fixed positions with relation to said arm.

In testimony whereof I have hereunto set my hand.

GEORGE A. llUNSlllG-R.

Witnesses PAUL N. Cnrrcrrnow, Framers J. Tormsson.

Copies of this patent may he obtained for five cen' each, by addressingthe Commissioner oi Patents.

Washington, D. C.

